​x
 
<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("button").click(function(){
    x=$("p").get(0);
    $("div").text(x.nodeName + ": " + x.innerHTML);
  });
});
</script>
</head>
<body>
<p>This is a paragraph</p>
<button>获得 p DOM 元素</button>
<div></div>
</body>
</html>
​